A single balanced armature driver delivers high fidelity sound reproduction not usually found in this price range. Using the same advanced technology as Westone's iconic ES Series, the Westone 1 delivers extraordinary detail and clarity every time you plug in. The Westone 1 is a perfect upgrade to unlock the potential of your MP3 player or entertainment device. Personal audio and video devices including iPod, CD, DVD, MP3 players, computers, and game consoles.